Cross-polarization interference canceller

Details Cross-polarization interference canceller Cross-polarization interference canceller

1991-01-22

1991-11-26

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including polarized signal communication transmitter or...

455295, 455296, H01Q 2106, H01Q 2124, H04B 710

Patent

active

050686674

ABSTRACT:
In a cross-polarization interference conceller for use in a digital radio communication system which transmits digital modulated signals over radio frequencies having planes of polarization orthogonal to each other, signals from the interfering polarized wave are sampled with a frequency equal to double the frequency of the affected polarized wave and, after latching the sampled signals with the frequency of the symbol rate, interference cancelling signals are generated by adding the products of their multiplication with control signals. Therefore, the digital multipliers and the digital adders for generating the interference cancelling signals can be operated at low speed.

REFERENCES:
patent: 4910468 (1990-03-01), Ohtsuka et al.
patent: 4992798 (1991-02-01), Nozue et al.
Proakis, Digital Communications, McGraw-Hill, 1983, pp. 364-371.
Lankl et al., IEEE International Conference on Communications '88, vol. 3, pp. 1355-1361.
Cross-Polarization Interference Cancellation in the Presence of Delay Effects.

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